MF1/4DCT52R43R2F Equivalent & Substitute Parts

Part Overview

The MF1/4DCT52R43R2F is a 43.2 Ohms ±1% 0.25W through-hole resistor manufactured by KOA Speer Electronics, Inc. This metal film axial resistor is designed for automotive applications and meets AEC-Q200 qualification standards. The component is currently in active production status with 738 units available in inventory. Substitute parts are identified when equivalent electrical and mechanical specifications are required for design flexibility, supply chain continuity, or inventory optimization.

Substiute Parts

MF1/4DCT52R43R2F

KOA Speer Electronics, Inc.In Stock: 753MF1/4DCT52R43R2F Datasheet

Current PartRFQ

MFR-25FBF52-43R2

YAGEOIn Stock: 26140MFR-25FBF52-43R2 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MF1/4DCT52R43R2F is determined by strict equivalence across the following critical parameters:

• Resistance value: 43.2 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 0.25W / 1/4W (exact match required)
• Composition: Metal Film (exact match required)
• Package configuration: Axial through-hole (exact match required)
• Temperature coefficient: ±100ppm/°C (exact match required)
• Operating temperature range: -55°C to 155°C (exact match required)
• Termination count: 2 (exact match required)
• Regulatory compliance: ROHS3 Compliant (exact match required)

The identified substitute part MFR-25FBF52-43R2 meets all electrical and mechanical equivalence criteria and is therefore classified as a direct substitute.

Parameter Comparison

Engineering Selection Recommendations

Both the MF1/4DCT52R43R2F and MFR-25FBF52-43R2 are active production components with ROHS3 compliance and REACH unaffected status. The MF1/4DCT52R43R2F carries automotive AEC-Q200 qualification, which is a specific requirement for automotive applications. The MFR-25FBF52-43R2 does not list automotive qualification in the provided specifications. Selection between these parts should be based on whether AEC-Q200 automotive qualification is a mandatory requirement for the application. Both components are electrically and mechanically equivalent across all specified parameters. Dimensional variation (0.091" vs 0.094" diameter) is within typical manufacturing tolerances for axial resistors and does not affect functional performance in standard through-hole PCB applications.

Frequently Asked Questions (FAQ)

Q: Can MFR-25FBF52-43R2 be used as a direct replacement for MF1/4DCT52R43R2F?

A: The MFR-25FBF52-43R2 is electrically and mechanically equivalent across all specified parameters including resistance, tolerance, power rating, composition, package type, temperature coefficient, and operating range. However, the MF1/4DCT52R43R2F carries AEC-Q200 automotive qualification while the YAGEO part does not list this certification. Use MFR-25FBF52-43R2 only if automotive qualification is not a design requirement.

Q: What is the significance of the dimensional difference between the two parts?

A: The MF1/4DCT52R43R2F has a diameter of 0.091" (2.30mm) while the MFR-25FBF52-43R2 has a diameter of 0.094" (2.40mm). This 0.003" difference is within standard manufacturing tolerances for axial resistors and does not affect PCB layout or electrical performance in typical through-hole applications.

Q: Are both parts RoHS compliant?

A: Yes, both the MF1/4DCT52R43R2F and MFR-25FBF52-43R2 are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

Q: What determines substitution eligibility for this resistor?

A: Substitution is based on exact equivalence of resistance value (43.2 Ohms), tolerance (±1%), power rating (0.25W), composition (metal film), package configuration (axial), temperature coefficient (±100ppm/°C), operating temperature range (-55°C to 155°C), and regulatory compliance status. All these parameters must match for a part to be considered a valid substitute.